Keaton Marek was found dead at 24th and M streets. His professors said he was a compassionate and eager student, who was not afraid to debate his classmates. Marek graduated from GW with a degree in political science in May.

With scenic hiking trails, historic neighborhoods and other cities at your fingertips, you should be reserving some Saturday afternoons for exploring before the breezy D.C. fall turns into blistery winter.